# abscissae

## abscissa

[ab-sis-uh]
noun, plural abscissas, abscissae [ab-sis-ee] . Mathematics.
(in plane Cartesian coordinates) the x-coordinate of a point: its distance from the y-axis measured parallel to the x-axis.
Compare ordinate.

Origin:
1690–1700; feminine of Latin abscissus (past participle of abscindere to abscind)

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
Cite This Source Link To abscissae
Collins
World English Dictionary
 abscissa (æbˈsɪsə) —n , pl -scissas, -scissae Compare ordinate the horizontal or x-coordinate of a point in a two-dimensional system of Cartesian coordinates. It is the distance from the y-axis measured parallel to the x-axis [C17: New Latin, originally linea abscissa a cut-off line]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
Cite This Source
Etymonline
Word Origin & History

abscissa
1690s, from L. abscissa (linea) "(a line) cut off," from fem. pp. of abscindere "to cut off," from ab- "off, away" + scindere "to cut" (see shed (v.)).
Online Etymology Dictionary, © 2010 Douglas Harper
Cite This Source
American Heritage
Science Dictionary
 abscissa   (āb-sĭs'ə)  Pronunciation Key  (click for larger image in new window) Plural abscissas or abscissae (āb-sĭs'ē) The distance of a point from the y-axis on a graph in the Cartesian coordinate system. It is measured parallel to the x-axis. For example, a point having coordinates (2,3) has 2 as its abscissa. Compare ordinate.
The American Heritage® Science Dictionary